66904375

素因数分解:

$5^4\times {\mathrm{167}}^1\times {\mathrm{641}}^1$

素因数の和:828

約数の個数: 20

約数和(自身を含む): 84235536

約数和(自身を除く): 17331161

約数列:

[1, 5, 25, 125, 167, 625, 641, 835, 3205, 4175, 16025, 20875, 80125, 104375, 107047, 400625, 535235, 2676175, 13380875, 66904375]

約数ペア:

[(1, 66904375), (5, 13380875), (25, 2676175), (125, 535235), (167, 400625), (625, 107047), (641, 104375), (835, 80125), (3205, 20875), (4175, 16025)]